Xylem MM 307H User Manual
Series 101-A
Electric Water Feeder
INSTRUCTION MANUAL
MM-307H
Applications:
For use on low pressure boilers with cold water
feed. The Series 101-A can be used with mechanical
or electronic low water cut-off controls.
WARNING
!
Do not use automatic water feeders with manual reset LWCO’s.
Failure to follow this warning could cause flooding, property damage, personal injury or death.
SPECIFICATIONS
Maximum Water Pressure: 150 psi (10.5 kg/cm2)
2
Maximum Boiler Pressure: 25 psi (1.76 kg/cm
Maximum Boiler Size: 5000 sq. ft. EDR
2,350,000 BTU/HR
Electrical Ratings
Model Voltage Full Load
101A-120 120V 40 VA
101A-24 24V 40 VA
Output Capacity
)
with
QUICK
CHANGE
Cartridge
Flow Data
Pressure Differential Flow Rate
psi (kg/cm2) gpm (lpm)
5 (.4) 1.4 (5.3)
10 (.7) 1.7 (6.4)
20 (1.4) 2.1 (7.9)
40 (2.8) 2.9 (11.0)
60 (4.2) 3.4 (12.9)
80 (5.6) 4.0 (15.1)
NOTE: 101A-24 includes a transformer with
120 volt primary and 24 volt/50VA secondary.
CAUTION
WARNING
• Before using this product read and understand instructions.
• Save these instructions for future reference.
• All work must be performed by qualified personnel trained in the proper application, installation, and maintenance of plumbing, steam, and electrical equipment and/or systems in
accordance with all applicable codes and ordinances.
• Boiler manufacturer schematics should always be followed. In the event that the boiler
manufacturer’s schematic does not exist, or is not available from the boiler manufacturer,
refer to the schematics provided in this document.
• To prevent water damage check to make sure there is adequate floor drainage capacity.
Check all components in the system to insure that they will not leak in the event of an
overfeed condition.
• To prevent electrical shock, turn off the electrical power before making electrical connections.
California Proposition 65 warning! This product contains chemicals known to the
•
state of California to cause cancer and birth defects or other reproductive harm.
Previous controls should never be installed on a new system. Always install new
•
controls on a new boiler or system.
Failure to follow this warning could cause property damage, personal inj ury or death.
CAUTION:
•
A more frequent replacement interval may be necessary based on the condition of
the unit at time of inspection. McDonnell Miller s warranty is one (1) year from date
of installation or two (2) years from the date of manufacture.
WARNING
!
!
&
'
FLOW
ARROW
6" (152mm)
6" (152mm)
6"
(152mm)
6"
(
152mm)
INSTALLATION
STEP 1 - Determine Where to Install the Water Feeder
IMPORTANT
!
Boiler manufacturer schematics should always be followed. In the
event that the boiler manufacturer’s schematic does not exist, or is
not available from the boiler manufacturer, refer to the schematics
provided in this document.
Determine where to install the water feeder
based on the following requirements:
a. It must be installed within eyesight of the boiler.
b. A minimum 6” (152mm) clearance should be
allowed on all sides for servicing.
c. It must be installed in a horizontal pipe in the
upright position.
d. It should be installed on the cold water line.
Installation Diagram and Requirements
a. Piping must be 1/2” (15mm) NPT
minimum.
b. Full port/full flow valves rated for the
pressure/temperature of the system
and piping they are to be installed on.
c. Arrow on feeder casting must point in
WATER FEEDER
direction of flow into the boiler.
d. Install isolation valves and unions on
UNION
the inlet and outlet piping of the feeder
for easier trouble-shooting and repair/
replacement.
FLOW ARROW
e. Install manual fill valve and bypass line
to allow for removal of the valve while
the boiler is in service.
STEP 2 - Electrical Installation
IMPORTANT
!
Boiler manufacturer schematics should always be followed. In the
event that the boiler manufacturer’s schematic does not exist, or is
not available from the boiler manufacturer, refer to the schematics
provided in this document.
I
NLE T VALVE
UNION
OUT LET VA LVE
UNION
CIT Y WATER SUP PLY
CHECK VALVE OR BACK
FLOW PREVENTER
(MAY BE REQUIRED BY
LOCAL CODE OR
ORDINANCES)
BYPAS S VALVE
CON NECT TO
RETURN HEADER
ON BOILER
NOTE: DO NOT CONNECT
DIR ECTLY TO BOI LER SHEL L
NOTE
Before connecting water feeder, operate boiler and
check all safety devices.
2
NOTE
Unless otherwise noted, water feeder voltage
should be the same as the LWCO and burner
circuit voltage.
!
WARNING
LWCO
L
evel
O
FF
O
N
• All work must be performed by qualified personnel trained in the proper application, installation, and
aintenace of plumbing, steam, and electrical equipment and/or systems in accordance with all applicable
m
codes and ordinances.
• To prevent electrical shock, turn off the electrical power before making electrical connections.
• To prevent an electrical fire or equipment damage, electrical wiring insulation must have a rating of
167˚F (75˚C) if the liquid’s temperature exceeds 180˚F (82˚C).
• To prevent an electrical fire or equipment damage, water feeder wiring must be on same circuit as all other
boiler controls.
Failure to follow this warning could cause property damage, personal injury or death.
a. Test the Low Water Cut-Off on the boiler.
b. Mark location of water level on sight glass where
Low Water Cut-Off turns off burner. This will be
used as reference to test the water feeder’s
operation.
c. Turn off all power to boiler and boiler controls.
d. Using a flathead screwdriver, remove electrical
cover plate.
f. Connect electric conduit to the water feeder’s electrical
enclosure.
g. Based on the water feeder and low water cut-off combination you are installing, select proper
wiring diagram and proceed to that page.
Water Feeder Low Water Cut-Off Page
Model Model
101A-120 & 67 with 24V or 120V burner circuit ..........................................................................4
101A-24 & 67 with 24V or 120V burner circuit .......................................................................4-5
101A-120 & 67G with millivolt burner circuit ................................................................................5
101A-24 & 67G with millivolt burner circuit ................................................................................5
101A-24 & PS-802-24 ................................................................................................................6
101A-120 & PS-801-120 ..............................................................................................................6
3
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